Paper cup and blank for making the same



1 632,868 June 1927 c. BARBIERI PAPER cur AND BLANK FOR MAKING Tim 'SAME Onginal Filed Feb. 8, 1923 W EEEEE m Patented June 21, 1927.-

UNITED STATES PATENT OFFICE.

OESARE BARBIERI, OI! NEW YORK, N. Y., ASSIGNOR TO THE VORTEX MFG. 00., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PAPER OUT AND BLANK FOR MAKING THE SANIE.

Application filed February 8, 1923. Serial No. 617,672.

This invention relates to flat folded paper cups of a general sector shape. It is an improvement on the invention shown-in my application Serial No. 572,518, filed July 3,

1922, for a paper cup. I V

It is an object of this invention to present apaper cup of a better appearance.

It is a further object of this invention to devise a paper cup which shall require less accuracy in the manufacture thereof.

It is a further object of this invention toproduce a paper cup in which the turned over end at the bottom shall not make an abrupt shoulder in the surface of the cup.

Other and further important objects of this invention will be apparent from the disclosures in the specification andthe accompanying drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter .-more fully described.

On the drawings;

Figure l is a side view .of the cup.

Figure 2 is a view, upon a somewhat smaller scale, of one side of the cup in partly folded condition.

Figure 3 'is a view of the blank from which the cup is made.

Figure 4 is a view of the other side of the cup in the partially folded condition shown in Fi 2.

Figure 5 1s a section upon an enlarged scale on the line 55 of Figure 1.

As shown on the drawings:

The cup 10 is of the eneral form of a sector, except that its pomt is turned over.

The blanks of which the cups are made have an arcuate ed e ll'and a radial edge 12. The other straight edge 13 of the blank, instead of being a radius, is parallel but spaced away from a radius so as to provide a a Tlib lower end of the flap 13 is cut at an angle to make a straight edge 17 in line with the edge 12. Between the edge 12 and the edge 17 the blank has a notch so that the center of curvature of the edge 11 is not within the body of the blank but in this,

notch. The sector bounded by the radii 12 and 16 has a straight edge 18 between it and the notch. In the same way the sector bounded by the radii 15 and 16 has a strai ht edge 19 between it and the notch. The ap 13, however, instead of having a straight edge separating it from the notch, has a rounded edge, as shown at 20. This rounded end of the flap extends beyond the straight line which, if it were present, would correspond to the lines 18 and 19.

Along the flap 13 is a strip of adhesive material 21 which goes to secure the flap 13 against the surface of the blank near the edge 12 when the cup is being formed. As illustrated, this strip of adhesive stops at the line 23, which, as explained below, is the location of a fold, but'the adhesive may, if desired, be continued beyond this line.

The blank is intended to be folded along the radius 15 which separates the flap from the sector proper. Another fold is along the radius 16 which divides the sector approximately in halves.

In making the cup from the blank, the, first fold brings the edge 12 onto the folding line 15. The next fold brings the flap 13 into a position where it covers the radial edge 12. After the folds along the lines 15 and 16, as explained, the cup will be in the form shown in Figures 2 and 4. The next step in making the cup is to apply adhesive as shown at 22 and fold the cup along a line 23. Since three thicknesses are folded in this last folding, the line 23 in the flat blank would show as a broken line having three straight parts. The several folds may be provided for in the blank by score marks,

creases or any. other of the usual means, or the blank maybe entirely uniform and the lfolding done without the assistance of such mes.

The adhesive 22 may be applied to the cup when it is in the condition shown in Figure 4, or may be applied tothe flat blank before any of the foldings are made. If the latter is done, the adhesive 22 will be on the opposite face of the blank from that shown in Figure 3. Although the adhesive 22 is illustrated as applied to the portion below the line 23 in Figure 4, it is obvious that an equally effective joint may be obtained by applying the adhesive above said line. If the adhesive 21 extends beyond the fold 23, it holds the ply at the point of the cup, which in Fig. 5 is illustrated as the top ply, in place. If, however, the adhesive does not extend past the fold 23, this ply will lie flat because held by folds at two ed es 15 and: 23.

After the adhesive is applie and the fold on the line 23 made, pressure isapplied to the folded cup to insure that the joints made by the adhesive will be firm. This pressure causes the part 25, which is that portion of the curved part 20 that projects beyond the edges 18 and 19, to become bent as shown in Figure 5. The pressure used to insure that provided instead of the straight ends 18 and 19, it would be necessary to fold the cup very accurately; otherwise, the rounded eedges would fail to be in register and by projecting at one side or the other would cause an unsightly appearance in the finished I cup. Also, if the rounded ends were not removed at the edges 18 and 19, they would be between the portion 25 and the body of the cup, making it impossible for this portionto slope downward as shown in Figure 5. The sloping character of this portion makes the edge of the bent-up part a bevel instead of a shoulder. Consequently, when a cup is withdrawn from a stack of cups by a dispensing machine, there is no shoulder likely 'to catch upon the other cups or on certain,-

parts of the machine and so make trouble. Cups provided with sloping parts 25 are therefore more readily used with dispensing machines.

I am aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

' 1. A sector-shaped cup, embodying a turned-up end at the prising a plurality o superimposed layers of material of substantially equal area, and an exterior layer slightly longer than the others so as to project beyond the underlying layers.

2. A paper cup having three plies of paper at the apex thereof, a fold across said apex whereby said three plies of paper are superimposed and folded over against the exterior surface of the cup, and adhesive between the innermost ly of the folded over portion and the cup ody, said folded over portion having the outermost ply extending slightly beyond the other plies so as to project beyond said underlying plies.

3. In a blank for pa er cups, 9. generally sector-shaped body, a ap along one radial side of said body, said body having a notch at the meeting point of said flap and the other radial edge, said notch having two straight edges and one convexed ed e, that portion of the blank embodying sai edges adapted to be folded over onto the body of the blank.

4. In a blank'for pa er cups, a generally sector-shaped body, a ap along one radial side of the body, said body having a notch at the meeting point of said flap and the other radial edge, said notch having two straight ed es se arating-it frbm the body of the blanlr, an in curvilinear edge separating it from saidflap.

In testimony whereof I have hereunto subscribed my name.

CESARE BARBIERI.

point of the cup com- 

